First 3D-printed human corneas

The first human corneas have been 3D printed by scientists at Newcastle University, UK , according to Science Daily.

It means the technique could be used in the future to ensure an unlimited supply of corneas.

As the outermost layer of the human eye, the cornea has an important role in focusing vision.

Yet there is a significant shortage of corneas available to transplant, with 10 million people worldwide requiring surgery to prevent corneal blindness as a result of diseases such as trachoma, an infectious eye disorder.

In addition, almost 5 million people suffer total blindness due to corneal scarring caused by burns, lacerations, abrasion or disease.

Mice regrow brain tissue after stroke with bioengineered gel

In a first-of-its-kind finding, a new stroke-healing gel helped regrow neurons and blood vessels in mice with stroke-damaged brains, according to Science Daily.

"We tested this in laboratory mice to determine if it would repair the brain in a model of stroke, and lead to recovery," said Dr. S. Thomas Carmichael, Professor and Chair of neurology at UCLA. "This study indicated that new brain tissue can be regenerated in what was previously just an inactive brain scar after stroke."

The results suggest that such an approach may someday be a new therapy for stroke in people, said Dr. Tatiana Segura, a former Professor of Chemical and Biomolecular Engineering at UCLA who is now a professor at Duke University.

Mars rocks may harbor signs of life from 4 billion years ago

Iron-rich rocks near ancient lake sites on Mars could hold vital clues that show life once existed there, research suggests.

These rocks -- which formed in lake beds -- are the best place to seek fossil evidence of life from billions of years ago, researchers say ,according to Science Daily.

A new study that sheds light on where fossils might be preserved could aid the search for traces of tiny creatures -- known as microbes -- on Mars, which it is thought may have supported primitive life forms around four billion years ago.

A team of scientists has determined that sedimentary rocks made of compacted mud or clay are the most likely to contain fossils. These rocks are rich in iron and a mineral called silica, which helps preserve fossils.

Tiny insect robot takes to the air, powered by laser beam

Swarms of tiny robots that carry out time consuming tasks could soon become a common sight after scientists figured out how to attach a “brain” to the mini laser-powered machines.

The University of Washington research team that created the insect-inspired droids says they could be used for a range of jobs, including surveying crops and sniffing out gas leaks, according to RT.

The fly-sized robots are too small to use propellers, so they work by fluttering their tiny wings. Previous attempts to create robo-insects were limited by the fact that the electronics needed to power and control their wings were too heavy for the machines to carry, so they had to be controlled through wires from the ground.

However, the engineers figured out a way to use an invisible laser beam to power the bugs.

Astronomers find fastest-growing black hole known in space

Astronomers have found the fastest-growing black hole known in the Universe, describing it as a monster that devours a mass equivalent to our sun every two days.

The astronomers have looked back more than 12 billion years to the early dark ages of the Universe, when this supermassive black hole was estimated to be the size of about 20 billion suns with a one per cent growth rate every one million years, according to Science Daily.

"This black hole is growing so rapidly that it's shining thousands of times more brightly than an entire galaxy, due to all of the gases it sucks in daily that cause lots of friction and heat," said Dr Wolf.

"If we had this monster sitting at the centre of our Milky Way galaxy, it would appear 10 times brighter than a full moon. It would appear as an incredibly bright pin-point star that would almost wash out all of the stars in the sky."

Dr Wolf said the energy emitted from this newly discovered supermassive black hole, also known as a quasar, was mostly ultraviolet light but also radiated x-rays.

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